Quick survey -- UPSs on slave nodes?

[Nicholas Webb]

At the University of Idaho we are preparing to order a new beowulf cluster
and a vendor seemed to be shocked that we wanted UPSs attached to ALL of
the nodes.  He stated that most people only use UPSs on the Master Node,
unless the cluster was used for some kind of mission critical purpose.
So the question, do you use UPSs on your slave nodes?  Arguments for not
using UPSs on slave nodes (and vice versa)?

Thanks!

--
Nick Webb